الوصول الحر: https://doaj.org/article/55f0e2207a1745a0953fbf00eed41351Test
الوصول الحر: https://doaj.org/article/0243903622554af0ba6ae31f997fd56eTest
الوصول الحر: https://doaj.org/article/8619690ed04a450b9a9d5abe0bfe75efTest
الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fbd5f02919c6c515934de94e0a648b4cTest